If someone knows your IP address, they can try to connect to your device directly.
There are tens of thousands of ports for every IP address, and a hacker who knows your IP can try to brute-force a connection.
Once they succeed, hackers can take control of your device, steal your data or even impersonate you.
Is it bad if someone knows my IP?
Whatever anyone knows about an IP associated with you personally in any way is of virtually no value in bringing harm to you. On mobile devices, any IP associated with the device will be very temporary. On mobile devices, any IP associated with the device will be very temporary.
Can someone use your IP address?
Neither your ISP nor anyone else can actually tell what you are doing on the Internet. But they can follow the activity of your public IP address—the one your router uses to access the Internet. Your ISP can identify it as yours, and will do so if subpoenaed.
Can someone hack my phone using IP address?
Usually, no. Just knowing someone’s IP address isn’t exactly enough to remotely hack their devices. Still, a very skilled cybercriminal could use your IP address to scan for open ports associated with it.
Can someone use my IP address to download illegally?
Hackers have been known to use stolen IP addresses to download illegal content like pirated material, child pornography, or content that threatens national security. Hacked IP addresses can also be used for DDoS attacks (“distributed denial-of-service”), which basically shut down your access to the Internet.